Bună!
[tex]a = \frac{1}{ - \sqrt{2} } - \frac{7}{3 - \sqrt{2} } + \sqrt{8} \\ a = \frac{1}{ - \sqrt{2} } - (3 + \sqrt{2}) + 2 \sqrt{2} \\ a = \frac{1}{ - \sqrt{2} } - 3 - \sqrt{2} + 2 \sqrt{2} \\a = - \frac{ \sqrt{} 2}{2} - 3 + \sqrt{2} \\ a = \frac{ \sqrt{2} }{2} - 3[/tex]
